PSM staff have to follow a rotate around the machine, mainly due to the safe systems of work meaning a maximum time upstairs, before moving downstairs on to another role. To be honest, a lot of the staff find that working upstairs for too long is tiring, not because it is hard work, but because they can almost fall asleep due to the monotony.
Our office have roughly 1.5 hours in each role across five sessions on a shift. That seems to work quite well.
The hardest role is tipping the york’s of work as you need to keep the belt going up into the machine full at all times - it is easier when you get into a rhythm with the other tipper - one removes the empty york and the other replaces it and presses the button to tip it. The “empty” york (which often has work stuck in it, then gets manually emptied in manual tipping point at the side.
The other hard bit is getting into the mindset of quick turn-around between plans. If you start on inward and switch to outward (or vice-versa), then you have to get the empty sleeves ready for a quick turn-around (labelled etc). The new aim is for a formula 1 style switch over (2 minutes) with all the crew apart from the tippers coming downstairs to switch over. The tippers prime the machine with the new workplan and then its ready for the manager to switch over.
Walksorting on the PSM is possible, but time consuming and won’t be done until the inward is completed and generally by then, its time to set up for the outward on Early shift or late shift.